Shells (snail) cleaning 3-piece set. Scalloped Catcher, Aquarium Cleaning Dish Towel, Aquarium Cleaning Cloth and 3 Piece Cleaning Gloves Easily remove unpleasant shellfish that grow in the aquarium. Since it is elastic, it can be removed without getting your hands wet even in a 11.8 inches (30 cm) underwater tank. The roller is rotated, and effectively catches shellfish effectively. Once caught the shell is inserted into the catcher case and will not go back into the aquarium. The soft finish roller will not scratch your aquarium. How to Use: 1. Lift the roller from the bottom and up with the main unit being placed on the surface of the aquarium. Shells caught in roller come in catcher case. 2. To prevent shells from falling through, please make sure to attach the contact point of the roller and the contact of the catcher case to the surface of the aquarium. 3. Remove the shells from the opening and closing part of the catcher case. 4. Adjust the handle according to the height of the aquarium. (You can use it without getting your hands wet up to a standard 23.6 inches (60 cm) aquarium. Caution: Please avoid using the silicone part of the aquarium. It may be damaged. ■ Please do not press strongly against the surface of the aquarium. Especially in acrylic aquariums there is a risk of scratches. ■ When removing the main unit from the aquarium, be sure to remove the water from the gap in the catcher case. No draining holes in the catcher case to prevent the shells from floating and escaping. ■ For removing shells on the aquarium surface. Shells on aquatic grass, accessories, gravel, etc. cannot be removed. Also included is a set of long disposable gloves that can be worn over the elbows, and a highly absorbent aquarium cleaning cloth.